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每张皮革都承载着两个历史:动物的生命和制革者的遗产。我们对两者都负有责任。
A mathematician is a person who can find analogies between theorems; a better mathematician is one who can see analogies between proofs and the best mathematician can notice analogies between theories.
在保护我们的海洋生态系统方面,每一个小小的行动都很重要。
平凡的事物总是具有政治性。